Update version to 2.20.0 (#327)

* Set version to 2.20.0

* remove unnessary whitespace

Co-authored-by: Steffengreiner <Steffen.Greiner@gmx.de>

Author: JohnnyQ5

pom.xml

@@ -7,7 +7,7 @@
 
   <groupId>life.qbic</groupId>
   <artifactId>data-model-lib</artifactId>
-  <version>2.20.0-SNAPSHOT</version>
+  <version>2.20.0</version>
   <name>data-model-lib</name>
   <url>http://github.com/qbicsoftware/data-model-lib</url>
   <description>Data models. A collection of QBiC's central data models and DTOs. </description>

src/test/groovy/life/qbic/datamodel/dtos/projectmanagement/ProjectSpaceSpec.groovy

@@ -29,6 +29,5 @@ class ProjectSpaceSpec extends Specification {
 
         then:
         thrown(IllegalArgumentException)
-
     }
 }